Binocular telescope.



UNITED sTATEs ,PiTENT oEEioE.

EDWARD BAUSCH, OF ROCHESTER, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,TO BAUSCH da LOMB OPTICAL COMPANY, (NO. 2,) A CORPORATION OF NEW YORK.

BINGULAR TELEscoPE.

Specication of Letters Patent.

Patented Dec. 8, 1908.

Application filed April 25, 1907. Serial No. 370,198.

To all who/fatt may concern:

Be it known that I, EDWARD BAUscH, of Rochester, in the county of Monroeand State of New York, have invented new and useful lfmprovements inBinocular Telescopes; and I do hereby declare the following to be afull, clear, and exact description of the same, reference being had tothe accompanying drawings, forming a part of the specification, and tothe reference-numerals marked thereon.

This invention relates to binocular telescopes and more particularly toadjusting mechanisms therefor; one object of the in vention being toprovide a simple and effective means for locking the barrels in thevarious positions to which they may be adjusted to obtain differentpupilary distances; another object being to provide means for lockingthe focal-adjusting mechanism against movement, whereby a certain focaladjustment cannot be accidentally disturbed in the handling of thetelescope; and a further object being to provide a means for giving oneof the eye pieces a secondary focal-adjustment without rotating the eyepiece and without adjusting the eye cap, as is usually done in makingthis focal-adjustment.

lVith these and still other ends in view, the invention consists of theparts and the combinations of parts shown in the drawings heretoannexed, hereinafter described and more particularly pointed out in theappended claims.

In the drawings; Figure 1, is a view show ing in longitudinal sectionthe main focal adjusting mechanism and the lock for the pupilaryadjusting mechanism, the other parts of the telescope being shown inelevation. Fig. 2, is a detail View showing in elevation the lock forthe pupilary adjusting mechanism. Fig. 3, is a bottom View of thetelescope showing the aforesaid lock in dotted lines. Fig. 4, is anenlarged detail sectional view on line a-a Fig. 3. Fig. 5, is alongitudinal section through the adjustable eye piece, and Fig. 6, is asection on line b-, Fig. 5.

lVith more particular reference to the drawings; A indicates theobjective casings which may be constructed in any suitable manner. Thesecasings have a hinged connection with each other to permit theirrelative adjustment for the purpose of varying the pupilary distance. Asa preferred manner of hinging the objectives, there is provided on eachcasing a pair of arms 2 and 3 which are, if desired, formed at theirfree ends so that, when assembled with the arms of the other casing, aflush joint is provided. Connecting the two joints is a tubular 0rhollow bolt 4 which passes through perforations in the ends of the arms,and is held in position by a head 5 at one end and a diskshaped nut 6which engages the other and threaded end. The walls of the perforationsthrough the hinge arms are lined with a hard metal 7 to prevent unduewear of the arms, which, together with the. outer wall of the objectivecasings, are preferably made of aluminum. To prevent dust reaching thesebearings and at the same time to hold the joints in spaced relation, thebolt is surrounded by a sleeve 8.

As a means for locking the objective casings against movement on theirhinged connection, there is carried by an arm of onel casing, a lockingmember 9, preferably in the form of a ring having an arcuate serratedlocking face 10 concentric ton the pivotal axis ofthe hinged connection.The face is arranged concentrically to the aforesaid axis so that whenan arcuate looking projection 11 on the adjacent arm of the otherobjective casing is moved with said arm, said projection will be inposition at all times to properly engage the face on the locking member9.

The locking member 9 is preferably made of spring material and normallytends to move to unlocking position, being for this purpose mounted upona beveled block 12 secured to a hinge arm of one of the objectivecasings. To move the locking member to and hold it in locking position,there is provided a lock nut 13 which has threaded engagement withthreads on the headed end 5 of bolt 4.

Thepeyepiece casings 14 and 14al have a hinged connection to permit themto move with the objective-casings for the pupilary adjustment. As ameans for forming this connection, two arms 15 are extended from theeyepiece casings 14 and 14a and have their free ends formed so that theywill lie flush when connected by a pivot pin 16 which passes throughperforations in the arms and is held in said perforations by a headedscrew 17. So as to prevent the pivot pin turning, one of the arms isprovided with a lip 18 which extends into a longitudinal groove in thepivot pin.

The focal adjustment of the telescope is obtained as usual, by movingthe eyepiece longitudinally of the objective casings. The means foraccomplishing this comprises a screwfmember 19 which, in this instance,is externally threaded and projects from the pivot pin 16 and isnon-rotatable owing to the fact that the pivot pin is held againstrotation by the lip 18. lVorking on the non-rotatable screw 19 is arotatable screw member 20 which, in the present instance, is in the formof an internallyv threaded sleeve, having one end externally screwthreaded to receive a thumb wheel 21. j

To prevent the focal adjustment being accidentally disturbed, therotatable screw member carries a frictional locking face, preferably inthe form of a disk 22 having` a central hollow boss 23 fitted in one endof the sleeve 2O and held against movement in said sleeve, as lforinstance, by a series of l screws 24 passing radially through the sleeveinto the boss 23. rl"`his locking face is adapted to engage afrlcti'ronal locking face on the disk-shaped nut-6 carried by theobjective casings, the rotatablescrew member,-

for this purpose,.being mounted to move axially. The means for movingsaid rotatable screw member axially and at the same time for holdingsaid locking faces in contact, comprises a spindle 25 which is arrangedwithin the tubular bolt 4, at one end has screw threaded engagement withthe inner wallvof the boss 23 and at the other has a screw thread 26engaged by a thumb nut 27 adapted to bear against the headed end 5 ofthe bolt 4. Nut 27 is held to the spindle by a headed screw 28 and themovement of the spindle, when loose, is limited both by the headed screwand by a nut 29 arranged within a depression 30 in the headed end of thebolt 4. rlhe otherl end of the spindle is prevented from turning in theboss 23, by the radial screws 24.

The secondary focal adjustment, that is. the adjustment for personshaving eyes of different strength, is obtained, as usual, by adjustingone eyepiece relatively to its objective and to the other eyepiece. Inprevious constructions it has been common when adjusting this eyepiece,to adjust the cap which bears around the eye and to rotate the eyepiece.The adjustment of the cap causes the instrument to be positionedunevenly, while the rotation of the eyepiece during sighting, isobjectionable.

In the present invent-ion the eyepiece casing of the adjustable eyepieceis secured to the hinge arm in any suitable manner and has the cap 31rigidly secured thereto, as by means of the reduced screw threaded end32 of the casing. The eyepiece carrier 33 pro- 1 f r i jects into theobjective casing' and 1s 1n the form of a divided tube movablelongitudinally within the casing and held against turning by aprojection 34 which works in a longitudinal slot 35 in the casing. Tomove the carrier, the eyepiece casing is surrounded by a cam ring 36which is formed on its inner wall with a spiral cani-groove 37 receivingthe free end of the projection 34, it being apparent that, when the camring is rotated, the eyepiece carrier willmove longitudinally.

To prevent dust passing between the wall of the cam-ring and the wall ofthe eyepiece casing and into the casing through the slot 35, the camring has a screw threaded connection with the outer wall of the casing,these screw threads being of such low pitch that the cam ring whenrotated will move longitudinally a very small distance only. So that thecam ring may be easily turned, it is provided with a peripheralprojection in the form of a hard rubber ring 36a which closes thecam-groove to the outside and is secured to the cam ring, as forinstance, by a screw 36h. A lock nut 38 for the cam ring surrounds thecasing and has a tubular extensionvto house a portion of said ring, andto preventthe cam ring loosening the lock nut, a washer 39 is interposedbetween said parts and has a tongue 40 projecting into a. longitudinalgroove 41 in the casing to prevent turning of the washer.

It will be apparent that the adjustments herein described, perfectlyexclude dust, are simple and effective in operation, and, while givingall necessary adjustments of a binocular telescope, are compactlyarranged.

Having thus described my invention, what I claim is:

1. In a binocular telescope, the combination with a pair of casings, andhinged connection between the casings, permitting a relative adjustmentof the casings for the pupilary distance, of means for locking saidparts in any of their adjusted positions, comprising a pair of lockingmembers each turning with one of the casings, and one being movable bothrelatively to its casing and also toward and from the other and having aserrated locking face arranged concentrically to the pivotal axis ofhinged connection.

2. ln a binocular telescope, the combination with a pair of casings, andhinged connection between the casings, permitting a relativeadjustmentof the casings for the pupilary distance, of means for lockingsaid parts in any of their adjusted positions, com prising a lockingmember carried by one of said casings, adapted to move into connection'with the other casing but normally tending to move out of connectiontherewith, and means for holding said member in locking position.l

3'. In a binocular telescope, the combination with a pair of casings,and hinged connection between the casings, permitting a relativeadjustment of the casings for vthe pupilary distance, of means forlocking said parts in any of their adjusted positions, cornprising alocking ring carried by one of said casings, formed of spring materialand normally tending to move to unlocking position a device forcoperating with the locking ring, and means for holding said ring inlocking position.

4. ln a binocular telescope, the combination with a pair of casings, andhinged connection between the casings, permitting a relative adjustmentof the casings for the pupilary distance, of means for locking saidparts in any of their adjusted positions, comprising a locking membernormally tending to move to unlocking position and having a serratedlocking face arranged concentrically 'to the pivotal axis of the hingedconnection a device for coperating with the serrated locking member, andmeans holding said serrated member in locking position. r

In a binocular telescope, the combination with a pair of casings, of ahinged connection between the casings, permitting a relative adjustmentof the casings for the pupilary distance, and embodying a bolt, oflocking means for holding the parts in their adjusted positions,comprising a locking ring carried by one casing, adapted for connectionwith the other casing, surrounding the bolt, and having a serratedlocking face.

G. in a binocular telescope, the combination with a pair of casings, ofa hinged connection between the casings, permitting a relativeadjustment of the casings for the pupilary distance, and embodying abolt, of locking means for holding the parts in their adjustedpositions, comprising a locking ring carried by one casing, adapted forconnection with the other casing, surrounding the bolt, and normallytending to move out of locking connection with the other casing, andmeans for holding said ring in locking position.

7. In a binocular telescope, the combination with a pair of casings, ofa hinged connection between the casings, permitting a relativeadjustment of the casings for the pupilary distance and embodying abolt, of locking means for holding the parts in their adjustedpositions, comprising a spring locking ring carried by one casing,adapted for connection with the other casing, surrounding the bolt andnormally tending to move to one position, and means moving said ring tothe other position.

8. n a binocular telescope, the combination with a pair of objectivecasings, and eyepiece casings adjustable on said iirst named casings,for the focal adjustment of the telescope, of means for adjusting saideyepiece casings on the objective casings, comprising a non-rotatablemember carried by the eyepiece casings, a cooperating rotatable screwmember ca-rried by the objective casings and movable axially intointerlocking connection with said casings and a device for moving therotatable screw into interlocking connection with the objective casing.

9. In a binocular telescope, the combination with a pair of objectivecasings, eyepiece casings adjustable on said objective casings for thefocal adjustment of the telescope, and a hinged connection between theobjective casings, embodying a tubular bolt, of means for adjusting theeyepiece casings on the objective casings, comprising a nonrotatablescrew member carried by the eyepiece casings, and a cooperating axiallymovable, rotatable screw member carried by the objective casings, havinga spindle extending entirely through the tubular bolt, and an exposedlock-nut upon the end of the spindle to hold the rotatable screw memberagainst axial movement.

10. In a binocular telescope, the combination with a pair of objectivecasings, a pair of eyepiece casings adjustable on the objective casingsfor the focal adjustment of the telescope, and a hinged connectionbetween the objective casings, embodying a tubular bolt, of a lockingface carried by the eyepiece casings, and means for adjusting theeyepiece casings, comprising a non-rotatable screw member carried by theeyepiece casings, and a cooperating axially movable, rotatable screwmember carried by the objective casings and having a locking faceadapted to contact with the locking face carried by the objectivecasings, a spindle extending through the tubular bolt, and a lock nutupon the end of the spindle to hold the locking face on the rotatablescrew member against the locking face carried by the objective casings.

11. In a binocular telescope, the combination with a pair of objectivecasings, eyepiece casings adjustable on the objective casings for thefocal adjustment of the telescope, and a hinged connectionbetween theobjective casings, embodying a tubular bolt, of means for adjusting theeyepiece casings on the objective casings, comprising a nonrotatingscrew carried by the eyepiece casings, and a cooperating rotatable,axially movable screw, having a spindle extending entirely through thetubular bolt, and exposed means on the end of the spindle for moving therotatable screw axially into connection with the objective casings tohold the screw against rotation.

12. In a binocular telescope, the combination with a pair of objectivecasings, eyepiece casings adjustable on the objective casings for thefocal adjustment of the telescope, and a hinged connection between theobjective casings, embodying a tubular bolt, of means for adjusting theeyepiece casings on the objective casings, comprising a nonrotatingscrew member carried by the eyepiece casings, and a cooperatingrotatable,

axially movable screw member comprising:

an internally threaded sleeve, a thumb Wheel on the sleeve, a diskhaving a central holloiv boss fitted in the end of the sleeve, a spindleitted in the boss and extending through the tubular bolt, screws passingradially7 through the sleeve and the boss and engaging the spindle, anda nut on the spindle for holding the rotating member against movement.

13. In a binocular telescope, a pair of objective casings, a pair ofeyepiece casings, one of Which carries a cap piece and has an eyepiececarrier adjustable in the direction of its optical axis relatively tothe cap piece; and means for simultaneously adjusting the eyepiececasings.

14. In a binocular telescope, a pair of objective casings, a pair ofeyepiece casings, an eyepiece carrier in one of the casingsindependently adjustable relatively to its cap, and means for adjustingsaid carrier coniprising a projection extending from the carrier and acam ring engaging said projection. j

l5. In a telescope, an eyepiece casing carrying a cap and provided Witha longitudinal slot, an eyepiece carrier having a projection extendingthrough the slot, and a l cam ring engaging the projection and movi ingthe carrier in the casing.

j lo. In a. binocular telescope, a pair of obj jeotive casings, a pairof eyepiece casings, an l eye piece carrier for one of the eye piececas- 1 ings adjustable independently of the latter, l and a ring foradjusting said carrier, hav- 1 ing screw threaded connection with its Icasing.

17. In a binocular telescope, a pair of objective casings, a pair of eyepiece casings, each of Which has a cap and is adjustable relatively toits objective casing, an eye piece carrier for one of said eye piececasings independently adjustable therein relatively to its cap, meanspreventing the turning of said carrier in its casing and means foradjusting said carrier longitudinally of its casing.

1S, In a binocular telescope, a pair of objective casings, a pair ofeyepiece casings, one of `Which has an eyepiece carrier independentlyadjustable therein, a ring surrounding the latter casing and havingconnection With the carrier to adjust the latter in its casing, a locknut for the ring, and a Washer having an interlocking connection withsaid casing and interposed between the lock-nut and the ring.

EDWARD BAUSCH. Witnesses C. M. WAGNER, W. G. lVooDWoRTH.

